2024年4月12日发(作者：)

锂电池正负极制备工艺流程

英文回答：

The manufacturing process of lithium-ion battery

electrodes involves several steps. Here is a general

overview of the process:

1. Electrode Material Preparation: The first step is to

prepare the active material for both the positive and

negative electrodes. For the positive electrode, lithium

cobalt oxide (LiCoO2) or lithium iron phosphate (LiFePO4)

is commonly used. For the negative electrode, graphite is

typically used. The active materials are mixed with binders

and conductive additives to form a slurry.

2. Coating: The slurry is then coated onto a current

collector, which is usually made of aluminum for the

positive electrode and copper for the negative electrode.

The coating process can be done using various techniques

such as doctor blade coating or slot-die coating. The

coated electrodes are then dried to remove the solvent.

3. Calendering: To improve the electrode's density and

adhesion, calendering is performed. This process involves

passing the coated electrodes through a set of rollers

under high pressure. Calendering helps to increase the

energy density and stability of the battery.

4. Electrode Cutting and Stacking: After calendering,

the electrodes are cut into desired shapes and sizes. The

positive and negative electrodes are then stacked together

with a separator in between. The separator prevents direct

contact between the electrodes, while allowing the flow of

lithium ions.

5. Electrolyte Filling: The stacked electrodes are

immersed in a liquid electrolyte, which is typically a

mixture of lithium salts and organic solvents. The

electrolyte fills the pores of the electrodes and enables

the movement of lithium ions during charge and discharge.

6. Sealing: Once the electrodes are filled with

electrolyte, the battery cell is sealed to prevent leakage

and ensure safety. The sealing process is usually done

using heat or ultrasonic welding.

7. Formation: The newly assembled battery cell

undergoes a formation process, which involves several

charge and discharge cycles. This process helps to

stabilize the battery's performance and capacity.

8. Battery Pack Assembly: Finally, multiple battery

cells are assembled together to form a battery pack. The

pack includes additional components such as a protective

circuit board, connectors, and casing.

中文回答：

锂电池正负极的制备工艺流程包括以下几个步骤：

1. 电极材料制备，首先要准备正负极的活性材料。正极常用的

是钴酸锂（LiCoO2）或磷酸铁锂（LiFePO4），而负极通常使用石墨。

活性材料与粘结剂和导电添加剂混合形成浆料。

2. 涂布，将浆料涂布在电流集电体上，正极通常采用铝制电流

集电体，负极则采用铜制电流集电体。涂布过程可以使用刮刀涂布

或槽模涂布等不同的技术。涂布后的电极需要经过干燥去除溶剂。

3. 压延，为了提高电极的密度和粘附性，需要进行压延处理。

这个过程涉及将涂布的电极通过一组辊子进行高压处理。压延有助

于提高电池的能量密度和稳定性。

4. 电极切割和叠层，经过压延后，电极被切割成所需的形状和

大小。正负极与隔膜叠层在一起。隔膜能够防止电极之间的直接接

触，同时允许锂离子的流动。

5. 充电液注入，将叠层的电极浸入液体电解液中，电解液通常

由锂盐和有机溶剂混合而成。电解液填充电极的孔隙，使得锂离子

在充放电过程中能够移动。

6. 密封，电极充满电解液后，电池单体进行密封，以防止泄漏

并确保安全。密封过程通常使用加热或超声波焊接进行。

7. 成型，新组装的电池单体经过一系列的充放电循环进行成型。

这个过程有助于稳定电池的性能和容量。

8. 电池组装，最后，多个电池单体组装在一起形成电池组。电

池组还包括其他组件，如保护电路板、连接器和外壳。